Re: [4.3-rc1 regression] modular 8250 doesn't load

[Greg Kroah-Hartman <gregkh@linuxfoundation.org>]

On Mon, Sep 14, 2015 at 07:08:10PM +0200, Mikael Pettersson wrote:
> I have CONFIG_SERIAL_8250=m.  With 4.2 '/sbin/modprobe 8250' worked
> and resulted in:
> 
> [   41.354550] Serial: 8250/16550 driver, 4 ports, IRQ sharing disabled
> [   41.375156] serial8250: ttyS0 at I/O 0x3f8 (irq = 4, base_baud = 115200) is a 16550A
> 
> With 4.3-rc1 however the command fails and logs the following:
> 
> [   34.140300] 8250_base: module license 'unspecified' taints kernel.

Oops, need to fix that.

> [   34.141846] Disabling lock debugging due to kernel taint
> [   34.143388] 8250_base: Unknown symbol uart_insert_char (err 0)
> [   34.144908] 8250_base: Unknown symbol uart_handle_dcd_change (err 0)
> [   34.146439] 8250_base: Unknown symbol __pm_runtime_resume (err 0)
> [   34.147901] 8250_base: Unknown symbol tty_termios_encode_baud_rate (err 0)
> [   34.149354] 8250_base: Unknown symbol uart_handle_cts_change (err 0)
> [   34.150798] 8250_base: Unknown symbol __pm_runtime_suspend (err 0)
> [   34.152240] 8250_base: Unknown symbol nr_irqs (err 0)

Are you sure you did 'modprobe' and not 'insmod'?

Peter, care to send a module license fix for this new module you
created?

thanks,

greg k-h